Ya, all of them lack some general theme/ focal point. I do like the 4th and 5th a lot.. the last one would be a lot better w/ more contrast. Just remember that although brushing looks cool.. it's not all there is to Photoshop.. a little brushing is ok, but there are so many other things to use in PS
Either way, they are all way better than any sig I could make if I tried right now Unless you're counting my current, cause in that case, you all PHAIL